yeah, affinity seems to be the top choice as an alternative. i also know if you happen to have an ipad, it is obviously a barebones application with the more basic tools, but inkpad is a great free ipad app that you can import svg's, custom fonts, etc.

Theres a brand new vector/illustrating software I was reading about a couple of months ago. I'll link it back once I can find it again. Best bet would be to play around with all the ones mentioned and see whats best for you.

IMO, Inkscape would be the best alternative if price is an issue. If price is not an issue then Illustrator. If learning curve is an issue then CorelDraw, if you don't mind the format being less portable.

Affinity - Just released today!

Just Released today FINAL vsn. grab it on app store for $39.99
unbelievable price! ...has Adobe Illustrator qualities with 10x the speed and
only some "swear jar" money to buy. $40 vs. $240 (Adobe Illustrator CC)